import { Enumerable } from '../enumerable';
declare module '../enumerable' {
    interface Enumerable<TSource> {
        select<TResult>(selector: (item: TSource, idx: number) => TResult): Enumerable<TResult>;
    }
}
export declare function select<TSource, TResult>(this: Enumerable<TSource>, selector: (item: TSource, idx: number) => TResult): Enumerable<TResult>;